Mobile terminal

ABSTRACT

A mobile terminal includes a housing having a front side, a rear side and lateral sides; a cover window disposed on the front side of the housing and comprising a display area and a bezel area. Further, the bezel area includes printed color under an edge of the cover window; an OLED display unit disposed between the cover window and the front side of the housing; and a sensing unit disposed under the OLED display unit. In addition, the OLED display unit includes a substrate having a hole below the display area of the cover window; a transistor layer including thin film transistors and being disposed on the substrate and having a hole corresponding to the hole of the substrate; an organic light emitting layer disposed on the transistor layer and having a hole corresponding to the hole of the transistor layer; and an encapsulation layer disposed on the organic light emitting layer and having a hole corresponding to the hole of the organic light emitting layer. Further, the sensing unit senses a light transmitted through the holes.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of co-pending U.S. patent applicationSer. No. 16/664,469 filed on Oct. 25, 2019, which is a Continuation ofU.S. patent application Ser. No. 16/216,478 filed on Dec. 11, 2018 (nowU.S. Pat. No. 10,491,726 issued on Nov. 26, 2019), which claims thepriority benefit under 35 U.S.C. § 119(a) to Korean Patent ApplicationNo. 10-2018-0000782 filed in the Republic of Korea on Jan. 3, 2018, allof which are hereby expressly incorporated by reference into the presentapplication.

BACKGROUND OF THE DISCLOSURE Field of the Invention

Embodiments of the present disclosure relate to a mobile terminal whichmay realize a full front display by providing a hole in a display unitand implement a sensor provided under the display unit via a hole.

Discussion of the Related Art

Terminals may be generally classified as mobile/portable terminals orstationary terminals. Such terminals may be classified as handheldterminals and vehicle mounted terminals according to presence of auser's direct portability.

As such functions become more diversified, the mobile terminal cansupport more complicated functions such as capturing images or video,reproducing music or video files, playing games, receiving broadcastsignals, and the like. By comprehensively and collectively implementingsuch functions, the mobile terminal may be embodied in the form of amultimedia player or device.

Recently, there are increasing demands for a full display which occupiesa front one surface of a display unit so as to provide a user with awide screen and enhance the portability.

SUMMARY OF THE INVENTION

Accordingly, an object of the present invention is to address theabove-noted and other problems and provide a mobile terminal whichincludes a hole provided in a display unit to realize a full frontdisplay and implements a sensor provided under the display unit via thehole.

Embodiments of the present disclosure provide a mobile terminalincluding a housing provided to define a predetermined accommodatingspace and comprising a cover window configured to transmit light anddisposed on one surface; a display unit provided under the cover window;a hole penetrating the display unit to contact with a lower surface ofthe cover window; and a sensing unit provided under the display unit andconfigured to sense the light transmitting the cover window via thehole.

Embodiments of the present disclosure also provide a method formanufacturing a mobile terminal including a step for forming a plasticsubstrate; a step for disposing a transistor film on the plasticsubstrate, the transistor film comprising a thin film transistor; a stepfor disposing an organic light emitting layer on the transistor film,the organic light emitting layer comprising spontaneous light emittingelements configured to emit preset colors by the flow of the currentscontrolled by the thin film transistor; a step for disposing a filmconfigured to shut off the spontaneous light emitting elements fromoxygen or moisture on the organic light emitting layer; a step foradhere a protection film configured to support the plastic substrate toa lower surface of the plastic substrate; a step for disposing apolarizing plate on the film; a step form forming a hole penetratingfrom the protection from the polarizing plate; and a step form disposinga cover window on the polarizing plate.

According to the embodiment of the present disclosure, the mobileterminal has following advantages. The hole is provided in the displayunit and the sensor is implemented via the hole. Accordingly, the mobileterminal can realize a full display in which the display unit isexpanded to a full front surface.

Furthermore, the spontaneous light emitting elements are designed on theorganic light emitting layer provided in the display unit, with thepredetermined margin with respect to the hole. Accordingly, thespontaneous light emitting elements can be protected from the moistureor oxygen inside the hole. Still further, the organic light emittinglayer can be formed according to new FMM (Fine Metal Mask) method todispose the spontaneous light emitting elements on the other area exceptthe hole-penetrating area.

Further scope of applicability of the present invention will becomeapparent from the detailed description given hereinafter. However, itshould be understood that the detailed description and specificexamples, while indicating preferred embodiments of the invention, aregiven by illustration only, since various changes and modificationswithin the spirit and scope of the invention will become apparent tothose skilled in the art from this detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will become more fully understood from thedetailed description given herein below and the accompanying drawings,which are given by illustration only, and thus are not limitative of thepresent invention, and wherein:

FIG. 1 is a block diagram of a mobile terminal in accordance with thepresent disclosure;

FIG. 2 is a perspective diagram of the mobile terminal;

FIG. 3 is a diagram illustrating a cover window, a display unit and asensing unit implemented to perform sensing via a hole provided in thedisplay unit;

FIG. 4 is a front view of an organic light emitting layer which composesthe display unit;

FIG. 5 is a sectional diagram schematically illustrating a transistorfilm and the organic light emitting layer which compose the displayunit;

FIG. 6 is a diagram illustrating a wiring structure of the transistorfilm provided in the display unit;

FIG. 7 is a sectional diagram schematically illustrating the coverwindow and the display unit and enlargedly illustrating an organic lightemitting layer and a film which are located adjacent to the hole;

FIG. 8 is a diagram including a sectional view of the display unit andthe cover window having an auxiliary film disposed on a front surface ofthe sensing unit and an enlarged sectional view of the auxiliary film;

FIG. 9 is a diagram including the display unit and the cover windowhaving an auxiliary film disposed on a lower surface of the sensing unitand an enlarged sectional view of the auxiliary film; and

FIG. 10 is a diagram illustrating FMM (Fine Metal Mask) which isconfigured to dispose a spontaneous emission element on the organiclight emitting layer, except an area which is penetrated by the hole.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Description will now be given in detail according to exemplaryembodiments disclosed herein, with reference to the accompanyingdrawings. For the sake of brief description with reference to thedrawings, the same or equivalent components may be provided with thesame reference numbers, and description thereof will not be repeated. Ingeneral, a suffix such as “module” and “unit” may be used to refer toelements or components. Use of such a suffix herein is merely intendedto facilitate description of the specification, and the suffix itself isnot intended to give any special meaning or function. The accompanyingdrawings are used to help easily understand various technical featuresand it should be understood that the embodiments presented herein arenot limited by the accompanying drawings. As such, the presentdisclosure should be construed to extend to any alterations, equivalentsand substitutes in addition to those which are particularly set out inthe accompanying drawings.

Although the terms first, second, etc. may be used herein to describevarious elements, these elements should not be limited by these terms.These terms are generally only used to distinguish one element fromanother.

When an element is referred to as being “connected with” anotherelement, the element can be connected with the other element orintervening elements may also be present. In contrast, when an elementis referred to as being “directly connected with” another element, thereare no intervening elements present.

A singular representation may include a plural representation unless itrepresents a definitely different meaning from the context. Terms suchas “include” or “has” are used herein and should be understood that theyare intended to indicate an existence of several components, functionsor steps, disclosed in the specification, and it is also understood thatgreater or fewer components, functions, or steps may likewise beutilized.

Mobile terminals presented herein may be implemented using a variety ofdifferent types of terminals. Examples of such terminals includecellular phones, smart phones, user equipment, laptop computers, digitalbroadcast terminals, personal digital assistants (PDAs), portablemultimedia players (PMPs), navigators, portable computers (PCs), slatePCs, tablet PCs, ultra books, wearable devices (for example, smartwatches, smart glasses, head mounted displays (HMDs)), and the like.

By way of non-limiting example only, further description will be madewith reference to particular types of mobile terminals. However, suchteachings apply equally to other types of terminals, such as those typesnoted above. In addition, these teachings may also be applied tostationary terminals such as digital TV, desktop computers, and thelike.

FIG. 1 is a block diagram of a mobile terminal in accordance with thepresent disclosure, and FIG. 2 is conceptual views of one example of themobile terminal. The mobile terminal 100 is shown having components suchas a wireless communication unit 110, an input unit 120, a sensing unit140, an output unit 150, an interface unit 160, a memory 170, acontroller 180, and a power supply unit 190. Implementing all of theillustrated components is not a requirement, and that greater or fewercomponents may alternatively be implemented.

Referring now to FIG. 1, the mobile terminal 100 is shown havingwireless communication unit 110 configured with several commonlyimplemented components. For instance, the wireless communication unit110 typically includes one or more components which permit wirelesscommunication between the mobile terminal 100 and a wirelesscommunication system or network within which the mobile terminal islocated.

The wireless communication unit 110 typically includes one or moremodules which permit communications such as wireless communicationsbetween the mobile terminal 100 and a wireless communication system,communications between the mobile terminal 100 and another mobileterminal, communications between the mobile terminal 100 and an externalserver. Further, the wireless communication unit 110 typically includesone or more modules which connect the mobile terminal 100 to one or morenetworks. To facilitate such communications, the wireless communicationunit 110 includes one or more of a broadcast receiving module 111, amobile communication module 112, a wireless Internet module 113, ashort-range communication module 114, and a location information module115.

The input unit 120 includes a camera 121 for obtaining images or video,a microphone 122, which is one type of audio input device for inputtingan audio signal, and a user input unit 123 (for example, a touch key, apush key, a mechanical key, a soft key, and the like) for allowing auser to input information. Data (for example, audio, video, image, andthe like) is obtained by the input unit 120 and may be analyzed andprocessed by controller 180 according to device parameters, usercommands, and combinations thereof.

The sensing unit 140 is typically implemented using one or more sensorsconfigured to sense internal information of the mobile terminal, thesurrounding environment of the mobile terminal, user information, andthe like. For example, in FIG. 1, the sensing unit 140 is shown having aproximity sensor 141 and an illumination sensor 142.

If desired, the sensing unit 140 may alternatively or additionallyinclude other types of sensors or devices, such as a touch sensor, anacceleration sensor, a magnetic sensor, a G-sensor, a gyroscope sensor,a motion sensor, an RGB sensor, an infrared (IR) sensor, a finger scansensor, a ultrasonic sensor, an optical sensor (for example, camera121), a microphone 122, a battery gauge, an environment sensor (forexample, a barometer, a hygrometer, a thermometer, a radiation detectionsensor, a thermal sensor, and a gas sensor, among others), and achemical sensor (for example, an electronic nose, a health care sensor,a biometric sensor, and the like), to name a few. The mobile terminal100 may be configured to utilize information obtained from sensing unit140, and in particular, information obtained from one or more sensors ofthe sensing unit 140, and combinations thereof.

The output unit 150 is typically configured to output various types ofinformation, such as audio, video, tactile output, and the like. Theoutput unit 150 is shown having a display unit 151, an audio outputmodule 152, a haptic module 153, and an optical output module 154.

The display unit 151 may have an inter-layered structure or anintegrated structure with a touch sensor in order to facilitate a touchscreen. The touch screen may provide an output interface between themobile terminal 100 and a user, as well as function as the user inputunit 123 which provides an input interface between the mobile terminal100 and the user.

The interface unit 160 serves as an interface with various types ofexternal devices that can be coupled to the mobile terminal 100. Theinterface unit 160, for example, may include any of wired or wirelessports, external power supply ports, wired or wireless data ports, memorycard ports, ports for connecting a device having an identificationmodule, audio input/output (I/O) ports, video I/O ports, earphone ports,and the like. In some cases, the mobile terminal 100 may performassorted control functions associated with a connected external device,in response to the external device being connected to the interface unit160.

The memory 170 is typically implemented to store data to support variousfunctions or features of the mobile terminal 100. For instance, thememory 170 may be configured to store application programs executed inthe mobile terminal 100, data or instructions for operations of themobile terminal 100, and the like. Some of these application programsmay be downloaded from an external server via wireless communication.Other application programs may be installed within the mobile terminal100 at time of manufacturing or shipping, which is typically the casefor basic functions of the mobile terminal 100 (for example, receiving acall, placing a call, receiving a message, sending a message, and thelike). It is common for application programs to be stored in the memory170, installed in the mobile terminal 100, and executed by thecontroller 180 to perform an operation (or function) for the mobileterminal 100.

The controller 180 typically functions to control overall operation ofthe mobile terminal 100, in addition to the operations associated withthe application programs. The controller 180 can provide or processinformation or functions appropriate for a user by processing signals,data, information and the like, which are input or output by the variouscomponents depicted in FIG. 1, or activating application programs storedin the memory 170. As one example, the controller 180 controls some orall of the components illustrated in FIGS. 1 and 2 according to theexecution of an application program that have been stored in the memory170.

The power supply unit 190 can be configured to receive external power orprovide internal power in order to supply appropriate power required foroperating elements and components included in the mobile terminal 100.The power supply unit 190 may include a battery, and the battery may beconfigured to be embedded in the terminal body, or configured to bedetachable from the terminal body.

Referring now to FIG. 2, the mobile terminal 100 is described withreference to a bar-type terminal body. However, the mobile terminal 100may alternatively be implemented in any of a variety of differentconfigurations. Examples of such configurations include watch-type,clip-type, glasses-type, or as a folder-type, flip-type, slide-type,swing-type, and swivel-type in which two and more bodies are combinedwith each other in a relatively movable manner, and combinationsthereof. Discussion herein will often relate to a particular type ofmobile terminal (for example, bar-type, watch-type, glasses-type, andthe like). However, such teachings with regard to a particular type ofmobile terminal will generally apply to other types of mobile terminalsas well.

The mobile terminal 100 will generally include a case (for example,frame, housing, cover, and the like) forming the appearance of theterminal. In this embodiment, the case is formed using the display unit151 and a rear case 102. Various electronic components are incorporatedinto a space formed between the display unit 151 and the rear case 102.Middle case 210 may be additionally positioned between the display unit151 and the rear case 102.

In recent years, as the size of a window 151 a of the display unit 151increases, the window 151 a of the display unit 151 can be configured tocover the entire front surface. The mobile terminal 100 may form acurved surface with a side surface in order to improve a feeling ofgrip. Thus, the outer surface of the middle case 210 may be formed as aconvex surface, or the edge of the display unit 151 may be bent in theback surface direction and coupled to the middle case 210. In addition,the rear case 102 may be formed such that the edge thereof is bent inthe front direction.

In some embodiments, electronic components may also be mounted to therear case 102. Examples of such electronic components include adetachable battery 191, an identification module, a memory card, and thelike. Rear cover 103 is shown covering the electronic components, andthis cover may be detachably coupled to the rear case 102. Therefore,when the rear cover 103 is detached from the rear case 102, theelectronic components mounted to the rear case 102 are externallyexposed.

As illustrated, when the rear cover 103 is coupled to the rear case 102,a side surface of the rear case 102 is partially exposed. In some cases,upon the coupling, the rear case 102 may also be completely shielded bythe rear cover 103. In some embodiments, the rear cover 103 may includean opening for externally exposing a camera 121 b or an audio outputmodule 152 b.

The cases 210, 102, 103 may be formed by injection-molding syntheticresin or may be formed of a metal, for example, stainless steel (STS),aluminum (Al), titanium (Ti), or the like. As an alternative to theexample in which the plurality of cases form an inner space foraccommodating components, the mobile terminal 100 may be configured suchthat one case forms the inner space. In this example, a mobile terminal100 having a uni-body is formed so synthetic resin or metal extends froma side surface to a rear surface.

If desired, the mobile terminal 100 may include a waterproofing unit forpreventing introduction of water into the terminal body. For example,the waterproofing unit may include a waterproofing member which islocated between the window 151 a and the front case 101, between thefront case 101 and the rear case 102, or between the rear case 102 andthe rear cover 103, to hermetically seal an inner space when those casesare coupled.

FIG. 2 depicts certain components as arranged on the mobile terminal100. However, alternative arrangements are possible and within theteachings of the instant disclosure. Some components may be omitted orrearranged. For example, the first manipulation unit 123 a may belocated on another surface of the terminal body, and the second audiooutput module 152 b may be located on the side surface of the terminalbody.

In addition, the display unit 151 outputs information processed in themobile terminal 100 and may be implemented using one or more suitabledisplay devices. Examples of such suitable display devices include aliquid crystal display (LCD), a thin film transistor-liquid crystaldisplay (TFT-LCD), an organic light emitting diode (OLED), a flexibledisplay, a 3-dimensional (3D) display, an e-ink display, andcombinations thereof.

The display unit 151 may be implemented using two display devices, whichcan implement the same or different display technology. For instance, aplurality of the display units 151 may be arranged on one side, eitherspaced apart from each other, or these devices may be integrated, orthese devices may be arranged on different surfaces.

The display unit 151 may also include a touch sensor which senses atouch input received at the display unit. When a touch is input to thedisplay unit 151, the touch sensor may be configured to sense this touchand the controller 180, for example, may generate a control command orother signal corresponding to the touch. The content which is input inthe touching manner may be a text or numerical value, or a menu itemwhich can be indicated or designated in various modes.

The touch sensor may be a film having a touch pattern, disposed betweenthe window 151 a and a display on a rear surface of the window 151 a, ora metal wire patterned directly on the rear surface of the window 151 a.Alternatively, the touch sensor may be integrally formed with thedisplay. For example, the touch sensor may be disposed on a substrate ofthe display or within the display.

The display unit 151 may also form a touch screen together with thetouch sensor. Here, the touch screen may serve as the user input unit123 (FIG. 1). Therefore, the touch screen may replace at least some ofthe functions of the first manipulation unit 123 a. In addition, thefirst audio output module 152 a may be implemented in the form of aspeaker to output voice audio, alarm sounds, multimedia audioreproduction, and the like.

The window of the display unit 151 will typically include an aperture topermit audio generated by the first audio output module 152 a to pass.One alternative is to allow audio to be released along an assembly gapbetween the structural bodies (for example, a gap between the window 151a and the front case 101). In this instance, a hole independently formedto output audio sounds may not be seen or is otherwise hidden in termsof appearance, thereby further simplifying the appearance andmanufacturing of the mobile terminal 100.

In addition, the optical output module 154 can output light forindicating an event generation. Examples of such events include amessage reception, a call signal reception, a missed call, an alarm, aschedule notice, an email reception, information reception through anapplication, and the like. When a user has checked a generated event,the controller can control the optical output unit 154 to stop the lightoutput.

The first camera 121 a can process image frames such as still or movingimages obtained by the image sensor in a capture mode or a video callmode. The processed image frames can then be displayed on the displayunit 151 or stored in the memory 170.

The first and second manipulation units 123 a and 123 b are examples ofthe user input unit 123, which may be manipulated by a user to provideinput to the mobile terminal 100. The first and second manipulationunits 123 a and 123 b may also be commonly referred to as a manipulatingportion, and may employ any tactile method that allows the user toperform manipulation such as touch, push, scroll, or the like. The firstand second manipulation units 123 a and 123 b may also employ anynon-tactile method that allows the user to perform manipulation such asproximity touch, hovering, or the like.

FIG. 2 illustrates the first manipulation unit 123 a as a touch key, butpossible alternatives include a mechanical key, a push key, a touch key,and combinations thereof. Input received at the first and secondmanipulation units 123 a and 123 b may be used in various ways. Forexample, the first manipulation unit 123 a may be used by the user toprovide an input to a menu, home key, cancel, search, or the like, andthe second manipulation unit 123 b may be used by the user to provide aninput to control a volume level being output from the first or secondaudio output modules 152 a or 152 b, to switch to a touch recognitionmode of the display unit 151, or the like.

As another example of the user input unit 123, a rear input unit may belocated on the rear surface of the terminal body. The rear input unitcan be manipulated by a user to provide input to the mobile terminal100. The input may be used in a variety of different ways. For example,the rear input unit may be used by the user to provide an input forpower on/off, start, end, scroll, control volume level being output fromthe first or second audio output modules 152 a or 152 b, switch to atouch recognition mode of the display unit 151, and the like. The rearinput unit may be configured to permit touch input, a push input, orcombinations thereof.

The rear input unit may be located to overlap the display unit 151 ofthe front side in a thickness direction of the terminal body. As oneexample, the rear input unit may be located on an upper end portion ofthe rear side of the terminal body such that a user can easilymanipulate it using a forefinger when the user grabs the terminal bodywith one hand. Alternatively, the rear input unit can be positioned atmost any location of the rear side of the terminal body.

Embodiments that include the rear input unit may implement some or allof the functionality of the first manipulation unit 123 a in the rearinput unit. As such, in situations where the first manipulation unit 123a is omitted from the front side, the display unit 151 can have a largerscreen.

As a further alternative, the mobile terminal 100 may include a fingerscan sensor which scans a user's fingerprint. The controller 180 canthen use fingerprint information sensed by the finger scan sensor aspart of an authentication procedure. The finger scan sensor may also beinstalled in the display unit 151 or implemented in the user input unit123.

The microphone 122 is shown located at an end of the mobile terminal100, but other locations are possible. If desired, multiple microphonesmay be implemented, with such an arrangement permitting the receiving ofstereo sounds.

The interface unit 160 may serve as a path allowing the mobile terminal100 to interface with external devices. For example, the interface unit160 may include one or more of a connection terminal for connecting toanother device (for example, an earphone, an external speaker, or thelike), a port for near field communication (for example, an InfraredData Association (IrDA) port, a Bluetooth port, a wireless LAN port, andthe like), or a power supply terminal for supplying power to the mobileterminal 100. The interface unit 160 may be implemented in the form of asocket for accommodating an external card, such as SubscriberIdentification Module (SIM), User Identity Module (UIM), or a memorycard for information storage.

The second camera 121 b is shown located at the rear side of theterminal body and includes an image capturing direction that issubstantially opposite to the image capturing direction of the firstcamera unit 121 a. If desired, second camera 121 a may alternatively belocated at other locations, or made to be moveable, in order to have adifferent image capturing direction from that which is shown.

The second camera 121 b can include a plurality of lenses arranged alongat least one line. The plurality of lenses may also be arranged in amatrix configuration. The cameras may be referred to as an “arraycamera.” When the second camera 121 b is implemented as an array camera,images may be captured in various manners using the plurality of lensesand images with better qualities.

As shown in FIG. 2, the second audio output module 152 b can be locatedon the terminal body. The second audio output module 152 b may implementstereophonic sound functions in conjunction with the first audio outputmodule 152 a, and may be also used for implementing a speaker phone modefor call communication.

At least one antenna for wireless communication may be located on theterminal body. The antenna may be installed in the terminal body orformed by the case. For example, an antenna which configures a part ofthe broadcast receiving module 111 may be retractable into the terminalbody. Alternatively, an antenna may be formed using a film attached toan inner surface of the rear cover 103, or a case that includes aconductive material.

A power supply unit 190 for supplying power to the mobile terminal 100may include a battery 191, which is mounted in the terminal body ordetachably coupled to an outside of the terminal body. The battery 191may receive power via a power source cable connected to the interfaceunit 160. Also, the battery 191 can be recharged in a wireless mannerusing a wireless charger. Wireless charging may be implemented bymagnetic induction or electromagnetic resonance.

The rear cover 103 is shown coupled to the rear case 102 for shieldingthe battery 191, to prevent separation of the battery 191, and toprotect the battery 191 from an external impact or from foreignmaterial. When the battery 191 is detachable from the terminal body, therear case 103 may be detachably coupled to the rear case 102.

An accessory for protecting an appearance or assisting or extending thefunctions of the mobile terminal 100 can also be provided on the mobileterminal 100. As one example of an accessory, a cover or pouch forcovering or accommodating at least one surface of the mobile terminal100 may be provided. The cover or pouch may cooperate with the displayunit 151 to extend the function of the mobile terminal 100. Anotherexample of the accessory is a touch pen for assisting or extending atouch input to a touch screen.

A terminal 100 according to various embodiments can generate and displayvarious wallpapers on the display unit 151. The terminal 100 can modifythe displayed wallpaper according to various modification conditions anddisplay the modified wallpaper on the display unit 151. In thisinstance, the wallpaper may correspond to an image displayed on a lockscreen or a home screen of the terminal 100. Hence, the wallpaper mayhave an image form, a video form, or a form in which an image and avideo are mixed. The modification condition may correspond to amodification period. Regarding this, it shall be explained in detail inthe following.

Next, FIG. 3 is a diagram illustrating a cover window 1511, a displayunit 151 and a sensing unit 140 implemented to perform sensing via ahole 1520 formed in the display unit 151. In addition, the mobileterminal 100 includes a housing defining a predetermined accommodatingspace and of which one surface has the cover window 1511 providedthereon, while the cover window 1511 is configured to transmit light. Asshown in FIG. 3, the display unit 151 is provided under the cover window1511; a hole 1520 a is provided in contact with a lower surface of thecover window 1511, while penetrating the display unit 151; and a sensorunit 140 is provided under the display unit 151 and implemented to sensethe light transmitting through the cover window 1511 via the hole 1520a.

Further, the display unit 151 of the mobile terminal may be provided asan OLED (Organic Light Emitting Diode) configured to emit lightspontaneously, which is different than an LCD (Liquid Crystal Display)configured to transmit light via a back side. Alternatively, the displayunit 151 of the mobile terminal may be provided as a POLED (PlasticOrganic Light Emitting Diode)) which provides more flexibility in thedesign of the display unit. FIG. 3 illustrates the display unit 151which is provided as a POLED.

The display unit 151 in FIG. 3 includes a polarizing plate 1513configured to shut off reflection of external light sources; a lightadhesive film 1512 provided to adhere the polarizing plate 1513 to thecover window 1511; an organic light emitting layer 1515 having aspontaneous light emitting element; a film 1514 disposed between thepolarizing plate 1513 and the organic light emitting layer 1515 andconfigured to shut off a plurality of spontaneous light emittingelements from oxygen or moisture; a transistor film 1516 provided underthe organic light emitting layer 1515 and having a thin film transistorconfigured to control electric currents flowing to the spontaneous lightemitting elements; a plastic substrate 1517 having the transistor film1516 disposed thereon; and a protective film 1518 supporting the plasticsubstrate 1517.

In addition, the sensing unit 140 corresponds to an element configuredto sense light or a signal via the hole. Examples of the sensing unit140 include the camera 121 or user input unit 123 mentioned above. Onereason why the hole 1520 a is provided to penetrate the display unit 151disposed under the cover window 1511 is as follows.

The transmittance of the polarizing plate 1513 will decrease accordingto the principle of light polarization, so that it is preferred that thehole 1520 is provided to allow the sensing unit 140 to sense the lightor signal precisely. Further, the organic light emitting layer 1513 mayinclude a cathode 1515 e (FIG. 5) to form an electrode to facilitateflow of electric currents to spontaneous light emitting elements 1515 b(FIG. 4). The cathode 1515 e may serve as a reflection layer forreflecting the light forwardly to the front of the mobile terminal 100via the cover window 1511. Accordingly, it is preferred that the organiclight emitting layer 1513 includes the hole 1520 a as having a not sogood transmittance.

So as to locate the holes 1520 a in parallel, it is easier to form thehole 1520 a at once when the hole-penetrating areas of the layers 1520are disposed in parallel as multilayers than to dispose the layers asmultilayers after forming the hole 1520 a in each layer.

Hereinafter, the elements located adjacent to the hole-penetrating areasof the layers 1512˜1518 which compose the display unit 151 will bedescribed. In particular, FIG. 4 is a front view of the organic lightemitting layer which composes the display unit 151. The organic lightemitting layer 1515 may include the plurality of the spontaneous lightemitting elements 1515 b emitting green, red and blue lights,respectively, aligned in the organic light emitting layer 1515.

FIG. 4(a) illustrates the area in which the hole 1520 is not provided,and FIG. 4(b) illustrates a front view of the organic light emittinglayer 1515 near the hole-penetrating area. As shown, the plurality ofthe spontaneous light emitting elements 1515 b may be arranged in theorganic light emitting layer 1515, spaced a preset distance apart fromthe hole 1520 a in a state where a first margin 1520 b covering the hole1520 a is located therebetween. In other words, the first margin 1520 bmay be provided between the plurality of the spontaneous light emittingelements 1515 b and the hole 1520 a.

The spontaneous light emitting element 1515 b has a disadvantage of ashort or reduced life span which is shortened or reduced by theoxidation caused by oxygen or moisture so an encapsulation process forshutting the elements off from oxygen or moisture is provided. Theencapsulation process covers the organic light emitting layer 1515 witha film 1514 (FIG. 3) formed of an organic and/or inorganic substance(s)so as to shut off the spontaneous light emitting elements 1515 b fromoxygen or moisture.

In this instance, some of the spontaneous light emitting elements 1515 blocated near the hole 1520 a need to be shut off from the oxygen ormoisture of the hole 1520 a. Accordingly, the film 1514 (FIGS. 3 and 7)can cover the first margin 1520 b and then protect the spontaneous lightemitting elements 1515 b adjacent to the hole 1520 a from the oxygen ormoisture inside the hole 1520 a.

Next, FIG. 5 is a sectional diagram schematically illustrating thetransistor film 1516 and the organic light emitting layer 1515 which areprovided in the display unit 151. The transistor film 1516 includes anovercoat layer 1516 a; a thin film transistor 1516 b and a gateinsulating layer 1516 c. The overcoat layer 1516 a formed of an organicinsulating material such as polyamide or photoacrylic may be disposed onthe thin film transistor 1516 b and configured to eliminate a stepformed by the thin film transistor 1516 b.

In addition, the thin film transistor 1516 b may include a source 302and a drain 303 which are configured to supply and receive an electrode;an active layer 307 through which electric currents flow; and a gate 301configured to adjust the flow or cut-off of the electric currentsflowing through the active layer 307. The gate insulating layer 1516 cseparates the gate 301 and the active layer 307 from each other.

The organic light emitting layer 1515 may include a cathode electrode1515 e and an anode electrode 1515 d which are connected to the drain303 arranged on the overcoat layer 1516 a; and the spontaneous lightemitting elements 1515 b configured to emit light once electric currentsflow between both electrodes. The organic light emitting layer 1515 mayfurther include a bank 1515 c formed of an inorganic insulating materialsuch as SiNx and provided between the spontaneous light emittingelements 1515 b to define a non-light-emitting area.

In this instance, the bank 1515 c can be spaced a preset distance apartfrom the hole 1520 a, with a second margin covering the hole 1520 abeing located therebetween. It is preferred that the second margin isprovided in the first margin 1520 b. That is because the film 1514(FIGS. 3 and 7) is provided in the second margin for shutting off thespontaneous light emitting elements 1515 from the moisture or oxygeninside the hole 1520 a.

Next, the wiring near the hole 1520 a of the transistor film 1516 willbe described. In particular, FIG. 6 is a diagram illustrating thestructure of the wiring formed in the transistor film 1516 provided inthe display unit 151.

The transistor film 1516 may include a current wire 304 configured toprovide a first signal for driving the thin film transistor. The currentwire 304 is connected to the gate 301 (FIG. 5) to serve as a switch forallowing the flow of currents to the active layer 307 (FIG. 5).

The current wire 304 may include a curve 304 a provided in a firstdirection and formed to make a detour around the hole 1520 a near thehole-penetrating area. The transistor film 1516 may include a data wire305 configured to provide a second signal for realizing an picture orimage on the cover window by flowing the current to the spontaneouslight emitting elements 1515 b when the thin film transistor is driven.The data wire 305 may be provided in a second direction and formed tomake a detour around the hole 1520 a near the hole-penetrating area.

Next, FIG. 7 illustrates a sectional diagram schematically illustratingthe cover window 1511 and the display unit 151 and a sectional diagramenlargedly illustrating the organic light emitting layer 1515 and thefilm 1514 near the hole 1520 a. The light adhesive film 1512 may includea bezel area 1512 a formed along an edge of the light adhesive film1512.

The bezel area 1512 a may be formed as a colored area to prevent theunnecessary escaping of light outside the display unit and to hide theother electronic components (e.g., the antenna and the like) provided inthe display unit 151. The bezel area 1512 a may be formed in an edgearea of an image or picture realizing area, while covering the imagerealizing area. The hole may be provided in the bezel area 1512 a.

The film 1514 may be formed to surround a lateral surface of the organiclight emitting layer 1515 to prevent moisture or oxygen from permeatingfrom the outside of the display unit. Further, the organic lightemitting layer 1515 may include an unevenness 1516 f spaced aparttherefrom to surround the organic light emitting layer 1515.

In addition, the film 1514 may be configured to cover the unevenness1516 f and the hole 1512 a may be located in an inner area of thedisplay unit 151, compared with the unevenness 1516 f. The film 1514 isdisposed on the organic light emitting layer 1515 and provided in thefirst or second margin adjacent to the hole 1520 a to shut off thespontaneous light emitting elements 1515 b from the oxygen or moistureinside the hole 1520 a.

Next, FIG. 8 is a diagram including a sectional view of the display unit151 and the cover window 1511 having an auxiliary film 500 disposed on afront surface of the sensing unit 140 and an enlarged sectional view ofthe auxiliary film 500. The auxiliary film may be an electrochromicelement 500. When the auxiliary film 500 is an electrochromic element,the electrochromic element may include a reducing discoloration material502 and an oxidation discoloration material 503 which are disposedbetween transparent electrodes 501 and 504; and a liquid electrolytecontaining Li+ ion 505.

Transparency of the electrochromic element may be determined accordingto a traveling direction of the Li+ ion 505 and the color of theelectrochromic element may be determined according to the elements whichcompose the electrochromic element. Alternatively, the auxiliary film500 may further include a polymer dispersed liquid crystal element.

In more detail, the polymer dispersed liquid crystal element may includea transparent conducting oxide film (ITO) disposed between transparentpolyester (PET) films and connected to the power supply. A polymerhaving liquid crystal particles disposed between the transparentconducing oxide films (ITO). When the power is applied, the liquidcrystal particles are arranged regularly to look transparent. When thepower is cut off, the liquid crystal particles are arranged irregularlyto look opaque.

More specifically, the electrochromic element or polymer dispersedliquid crystal element may be provided under the cover window 1511,adjacent to the hole 1520 a, to keep a transparent state of the coverwindow when the sensing unit 140 is implemented and an opaque state whenthe sensing unit 140 is not implemented.

FIG. 9 is a diagram including the display unit 151 and the cover window1511 having an auxiliary film disposed on a lower surface of the sensingunit 140 and an enlarged sectional view of the auxiliary film. The filmprovided under the sensing unit 140 may be a piezoelectric film 600.

Currents may flow to the piezoelectric film 600 when a preset pressureis applied to the sensing unit 140 via the cover window 1511. Thepiezoelectric film 600 may include a piezoelectric material 602 disposedbetween the positive and negative poles 601 and 603 and convert thepreset pressure applied to the sensing unit 140 by the electric energygenerated by the external physical stress into an electrical signal. Thesensing unit 140 can be switched on and off or implemented to perform aspecific operation based on the electrical signal converted from thepressure applied via the piezoelectric film 600.

Hereinafter, a manufacturing method of the mobile terminal including thedisplay unit 151 will be described. According to the manufacturingprocess of the mobile terminal, the display unit 151 is formed and thehole 1520 a penetrating the display unit 151 is then formed. Hence, thecover window 1511 is disposed on the display unit 151.

More specifically, to form the display unit 151, a plastic substrate1517 is formed on a glass substrate and the transistor film 1516 havingthe thin film transistor is disposed on the plastic substrate 1517.Hence, the organic light emitting layer 1515, which includes thespontaneous light emitting elements configured to emit a preset coloredlight once the currents controlled by the thin film transistor flow tothe transistor film 1516, is disposed on the transistor film 1516, andthe film 1514 configured to shut off the spontaneous light emittingelements from oxygen or moisture is then disposed on the organic lightemitting layer 1515. After that, the glass substrate is eliminated andthe protection film 1518 is adhered to a back side of the plasticsubstrate 1517. Hence, the polarizing plate 1513 is disposed on the film1514 and the hole 1520 a is formed by penetrating from the protectionfilm 1518 to the polarizing plate 1513.

After the plurality of the layers for forming the display unit 151 aredisposed, the hole 1520 a is formed via the layers and the cover window1511 is then disposed on the polarizing plate 1513, so that the mobileterminal may be manufactured. In this instance, the order of disposingthe plurality of the layers to form the display unit 151 may be changed.

The light adhesive film 1512 may be further disposed between thepolarizing plate 1513 and the cover window 1511. After the lightadhesive film 1512 formed of a transparent material is disposed on thepolarizing plate 1513, the hole 1520 a may be formed or the lightadhesive film 1512 may be disposed after the hole 1520 a is formed.

A FMM (Fine Metal Mask) method may be applied to the organic lightemitting layer 1515 by forming the spontaneous light emitting elements1515 b. Further, it is efficient to dispose the spontaneous lightemitting elements 1515 b in the other area of the organic light emittinglayer 1515 except the area where the hole 1520 a is formed.

Hereinafter, the FMM method for disposing the spontaneous light emittingelements 1515 b on the organic light emitting layer 1515 except the hole1520 penetrating area will be described. In more detail, referring toFIG. 10. The process of forming the organic light emitting layer 1515may include a step for locating the transistor film 1516 near a FMM 201and disposing the spontaneous light emitting element 1515 b by passingorganic vapor therethrough.

The FMM 201 may include a second hole 203 having a first area which isblocked and a second area through which the organic vapor passes, whilesurrounding the first area. In other words, the organic vapor generatedin the source 202 passes through the second hole 203 so as to disposethe spontaneous light emitting element 1515 b. At this time, the FMM 201has a blocked area which is corresponding to the hole-penetrating area1520 so that the spontaneous light emitting element 1515 b may bedisposed in an outer area around the hole-penetrating area 1520.

The hole-penetrating area 1520 may include a first margin 1520 b whichsurrounds the hole 1520 a (FIG. 4). Accordingly, the spontaneous lightemitting element may be disposed on the organic light emitting layerwith locating the first margin 1520 surrounding the hole 1520 atherebetween, spaced a preset distance apart from the hole 1520 a.

In this instance, the film 1514 is formed while covering thehole-penetrating area 1520. After the hole 1520 a penetrates the area,the film 1514 provided in the first margin 1520 a can shut off thespontaneous light emitting element from the moisture or oxygen insidethe hole 1520 a.

As the present features may be embodied in several forms withoutdeparting from the characteristics thereof, it should also be understoodthat the above-described embodiments are not limited by any of thedetails of the foregoing description, unless otherwise specified, butrather should be considered broadly within its scope as defined in theappended claims, and therefore all changes and modifications that fallwithin the metes and bounds of the claims, or equivalents of such metesand bounds, are therefore intended to be embraced by the appendedclaims.

What is claimed is:
 1. A mobile terminal comprising: a housing having afront side, a rear side and lateral sides; a cover window disposed onthe front side of the housing and comprising a display area and a bezelarea, wherein the bezel area includes printed color under an edge of thecover window; an OLED display unit disposed between the cover window andthe front side of the housing; and a sensing unit disposed under theOLED display unit, wherein the OLED display unit comprises: a substratehaving a hole below the display area of the cover window; a transistorlayer including thin film transistors and being disposed on thesubstrate and having a hole corresponding to the hole of the substrate;an organic light emitting layer disposed on the transistor layer andhaving a hole corresponding to the hole of the transistor layer; and anencapsulation layer disposed on the organic light emitting layer andhaving a hole corresponding to the hole of the organic light emittinglayer, and wherein the sensing unit senses a light transmitted throughthe holes.
 2. The mobile terminal of claim 1, wherein the OLED displayunit further comprises: a polarizing plate disposed on the encapsulationlayer and having a hole corresponding to the hole of the encapsulationlayer.
 3. The mobile terminal of claim 1, wherein the organic lightemitting layer includes a plurality of spontaneous light emittingelements disposed below the display area to respectively emit presetcolors.
 4. The mobile terminal of claim 3, wherein the OLED display unitcomprises: a polarizing plate disposed on the encapsulation layer andhaving a hole corresponding to the hole of the encapsulation layer; alight adhesive film adhering the polarizing plate to the cover windowand having a hole corresponding to the hole of the polarizing plate; anda protection film supporting the substrate, wherein the encapsulationlayer is provided between the polarizing plate and the organic lightemitting layer, and wherein the transistor layer controls currentsflowing to the spontaneous light emitting elements.
 5. The mobileterminal of claim 3, wherein the spontaneous light emitting elements areprovided in the organic light emitting layer, encircle a margin areasurrounding the hole of the organic light emitting layer, and whereinthe margin area is located between the hole of the organic lightemitting layer and the spontaneous light emitting elements.
 6. Themobile terminal of claim 5, wherein the spontaneous light emittingelements comprise: a plurality of first elements have a first size; anda plurality of second elements have a second size different from thefirst size, and wherein some of the first elements and some of thesecond elements are disposed outside the margin area along a shape ofthe hole.
 7. The mobile terminal of claim 5, wherein a width of themargin area is substantially the same in all directions.
 8. The mobileterminal of claim 5, wherein the encapsulation layer is provided in themargin area and seals off the spontaneous light emitting elements frommoisture or oxygen inside the holes.
 9. The mobile terminal of claim 5,wherein the organic light emitting layer comprises a bank providedbetween the spontaneous light emitting elements and forming anon-light-emitting area, and wherein the bank is spaced a presetdistance apart from the hole of the organic light emitting layer by themargin area.
 10. The mobile terminal of claim 5, wherein theencapsulation layer is provided in the margin area.
 11. The mobileterminal of claim 1, wherein the transistor layer comprises acorresponding current wire providing a first signal for driving acorresponding thin film transistor, and wherein the current wire isprovided in a first direction and includes a curve detouring around thehole of the transistor layer.
 12. The mobile terminal of claim 11,wherein the transistor layer comprises a corresponding data wireproviding a second signal for realizing a picture or an image via thecover window by a flow of currents to the spontaneous light emittingelements connected to a corresponding thin film transistor when thecorresponding thin film transistor is driven, and wherein the data wireis provided in a second direction including a curve detouring around thehole of the transistor layer.
 13. The mobile terminal of claim 4,wherein the bezel area is printed along an edge area of the lightadhesive film.
 14. The mobile terminal of claim 1, further comprising:an electrochromic element provided under the cover window.
 15. Themobile terminal of claim 1, further comprising: a polymer dispersedliquid crystal provided in the cover window.
 16. The mobile terminal ofclaim 1, further comprising: a piezoelectric film provided under thesensing unit and configured to flow currents therethrough when a presetpressure is applied to the sensing unit via the cover window.
 17. Themobile terminal of claim 1, wherein the encapsulation layer includes atapered edge part on an edge area of the substrate, and wherein thetapered edge part has an inclined surface that is lowered toward anoutermost edge of the substrate.
 18. The mobile terminal of claim 1,wherein the sensing unit includes a camera.
 19. A mobile terminalcomprising: a housing having a front side, a rear side and lateralsides; a cover window disposed on the front side of the housing andcomprising a display area and a bezel area, wherein the bezel areaincludes printed color under an edge of the cover window; an OLEDdisplay unit disposed between the cover window and the front side of thehousing; and a sensing unit disposed under the OLED display unit,wherein an organic light emitting layer of the OLED display unitcomprises: a first hole disposed below the display area of the coverwindow; at least one of first spontaneous light emitting elementsdisposed below the display area of the cover window and having a firstsize; and at least one of second spontaneous light emitting elementsdisposed below the display area of the cover window and having a secondsize different from the first size, and wherein the sensing unit sensesa light transmitted through the first hole.
 20. The mobile terminal ofclaim 19, wherein the OLED display unit further comprises: a substratehaving a second hole corresponding to the first hole; a transistor layerincluding thin film transistors and being disposed on the substrate andhaving a third hole corresponding to the second hole; and anencapsulation layer disposed on the organic light emitting layer andhaving a fourth hole corresponding to the first hole, and wherein theorganic light emitting layer is disposed on the transistor layer. 21.The mobile terminal of claim 20, wherein the OLED display unit furthercomprises: a polarizing plate disposed on the encapsulation layer andhaving a fifth hole corresponding to the fourth hole.
 22. The mobileterminal of claim 21, wherein the OLED display unit further comprises: alight adhesive film adhering the polarizing plate to the cover windowand having a sixth hole corresponding to the fifth hole of thepolarizing plate; and a protection film supporting the substrate. 23.The mobile terminal of claim 19, wherein the first and secondspontaneous light emitting elements encircle a margin area surroundingthe first hole, wherein the margin area is located between the first andsecond spontaneous light emitting elements, and the first hole, andwherein some of the first spontaneous light emitting elements and someof the second spontaneous light emitting elements are disposed outsidethe margin area along a shape of the first hole.
 24. The mobile terminalof claim 23, wherein the organic light emitting layer comprises a bankprovided between the spontaneous light emitting elements, and whereinthe bank is spaced a preset distance apart from the first hole by themargin area.
 25. The mobile terminal of claim 20, wherein the transistorlayer comprises a corresponding current wire providing a first signalfor driving a corresponding thin film transistor, and wherein thecurrent wire is provided in a first direction and includes a curvedetouring around the third hole of the transistor layer.
 26. The mobileterminal of claim 25, wherein the transistor layer comprises acorresponding data wire providing a second signal for realizing apicture or an image via the cover window by a flow of currents to thefirst and second spontaneous light emitting elements connected to acorresponding thin film transistor when the corresponding thin filmtransistor is driven, and wherein the data wire is provided in a seconddirection including a curve detouring around the third hole of thetransistor layer.
 27. The mobile terminal of claim 20, wherein theencapsulation layer includes a tapered part on an edge area of thesubstrate, and wherein the tapered edge part has an inclined surfacethat is lowered toward an outermost edge of the substrate.
 28. Themobile terminal of claim 19, wherein the sensing unit includes a camera.